Chemistry - November 2006

I have tried dissolving MgCl2.6H2O in water (100ml). Failing that, I tried dissolving the compound on a heat block...failing that (!!) i tried pH'ing whilst dissolving....nothing works! But I'm told that the solution can definately be made - but how??? Any ideas??

2006-11-17 08:05:51 · 0 answers · asked by Curious kitten! 2

SO2 + O2 → SO3


how many moles of SO3 are produced from the complete reaction of 1.16 moles of O2 ?

Enter a numeric answer only, no units.

2006-11-17 08:00:30 · 2 answers · asked by Anonymous

A 3.827 g sample of this compound was burned in pure oxygen gas. The measured amount of CO2 produced was 5.256 g, while that of H2O was 4.303 g. No other products were produced in the reaction.

How many moles of carbon were in the original sample that underwent combustion ?

2006-11-17 07:59:26 · 1 answers · asked by Anonymous

When a blood sample has been taken by crime scene officers and they say they have had a hit is that conclusive evidence that the sample they have can be definately matched to a sample on record? If so why would the police have to take another sample, I thought one sample would have been enough.

2006-11-17 07:59:00 · 2 answers · asked by Linda R 2

I mean ordinary watches of titan,citizen etc. on the back of watches it may be written that it was platted with 24 carrat gold .Is there any true in that?

2006-11-17 07:19:55 · 11 answers · asked by asif 1

2006-11-17 07:16:31 · 3 answers · asked by Heavy Metal 3

i.e. if you add hot water (+100c) to cold water (-100c) what temp would you end up with???? (equal amounts)

2006-11-17 06:40:28 · 10 answers · asked by charley7515 2

Imagine that an amobea is placed in a solution of salty water. The concentration of salt in in the solution is greater than the salt concentration of the amobea's watery cytoplasm. What will happen,and why? Be sure to use the proper science terms to communicate your understanding.

The first person to answer a full good answer i will automatically choose him as the best answer. Be sure to use eight grade words not to big.

2006-11-17 06:35:52 · 4 answers · asked by helper 1

the formula or explanation. can you make it simple

2006-11-17 06:25:47 · 2 answers · asked by Josh 2

Do you know any easy way to memorise organic chemistry reaction ?Because there are so many reactions in organic chemistry and it is very difficult to memorise them.If you know any kinds of easiest way or tricks to memorise reactions,please tell me.

2006-11-17 05:54:48 · 7 answers · asked by star123 2

2006-11-17 05:39:23 · 6 answers · asked by barrelracer12 3

A certain compound was found to have a molar mass of 72.106 g. A 3.192 g sample of this compound was burned in pure oxygen gas. The measured amount of CO2 produced was 7.793 g, while that of H2O was 3.190 g. No other products were produced in the reaction.

2006-11-17 05:24:30 · 1 answers · asked by mimi 1

Elemental ananalysis of a compound results in the following data

65.45 % C

5.49 % H

29.06 % O


4.13 g of the compound fills a 183.0 ml bottle with a pressure of 2508.6 mm Hg at a temperature of 21.3oC.

2006-11-17 05:23:52 · 3 answers · asked by mimi 1

I need help with my science fair project. also if any1 has another 11th grade science fair project that I can do please tell me. help!!!

2006-11-17 05:06:59 · 2 answers · asked by I.C 1

2006-11-17 05:04:06 · 3 answers · asked by ChaseMakesMeSmile 2

Sodium oxalate solution, Na2C2O4 (aq), is treated with hydrochloric acid?

2006-11-17 05:04:01 · 1 answers · asked by BOK CHOY 1

2006-11-17 05:02:15 · 3 answers · asked by Star 2

a piece of lead is dropped into an aqueous solution of gold (III) nitrate?

2006-11-17 05:00:00 · 1 answers · asked by BOK CHOY 1

2006-11-17 04:50:25 · 4 answers · asked by starreyes2000_2000 1

2006-11-17 04:47:43 · 8 answers · asked by starreyes2000_2000 1

I have a question in the Free Energy section of our textbook that is giving me problems. Here goes "When carbon and oxygen combine to form carbon dioxide, the reaction releases more free energy when diamond is used as a source of carbon than when graphite is used as the carbon source. Based on this information, will diamond spontaneously decompose into graphite? If it does why do we not see our diamond jewelry become pencil points? If it does not, then does this imply that diamonds will last forever?

thanks

2006-11-17 04:43:34 · 5 answers · asked by Howard 1

Is there a way to build/construct a miniature working hydrogen fuel cell??? if there is can u gie me the link/url to the place you found the information of just tel me now?? i really need t know

THANX

2006-11-17 04:41:14 · 2 answers · asked by rock4evah13 1

2006-11-17 04:38:39 · 2 answers · asked by Angel Eve 6

I've been told to believe it can.

2006-11-17 04:35:49 · 3 answers · asked by mikeygonebad2007 1

AI2O3 (s) + C (s) --- AI (s) + CO2 (g). How many grams of carbon are required to produce 1.00g of aluminum, and what is the coefficient in front of CO2.

2006-11-17 03:54:38 · 3 answers · asked by freemanjr2 1

oxygen is a non polar molecule, o2, how would this dissolve in a polar solvent such as water. Dissolved oxygen is vital to life but how does it get there. what ion would the oxygen form to dissolve, O- or O2-?

2006-11-17 03:28:52 · 8 answers · asked by Anonymous

which of the following compounds would you expect to be insoluble.

Aluminum nitrate
aluminum hydroxide
aluminum chlorate
aluminum acetate

2006-11-17 03:11:52 · 3 answers · asked by nglennie_06 1

2006-11-17 02:35:33 · 7 answers · asked by Leonard 1

2006-11-17 02:34:25 · 8 answers · asked by Leonard 1

using heat energy

2006-11-17 02:28:30 · 9 answers · asked by Anonymous